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Fair Value Measurements - Contingent Purchase Price Consideration, Measured at Estimated Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Liabilities: |  |
Warrant liability | $ 114 | $ 55
Fair Value, Measurements, Recurring |  |
Assets: |  |
Cash equivalents | 29,455 | 34,959
Restricted cash equivalents | 100 | 100
Total assets measured and recorded at fair value | 29,555 | 35,059
Liabilities: |  |
Warrant liability | 114 | 55
Contingent consideration | 4,896 | 4,633
Total liabilities measured and recorded at fair value | 5,010 | 4,688
Fair Value, Measurements, Recurring | Quoted Prices In Active Markets (Level 1) |  |
Assets: |  |
Cash equivalents | 29,455 | 34,959
Restricted cash equivalents | 100 | 100
Total assets measured and recorded at fair value | 29,555 | 35,059
Liabilities: |  |
Warrant liability | 0 | 0
Contingent consideration | 0 | 0
Total liabilities measured and recorded at fair value | 0 | 0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Cash equivalents | 0 | 0
Restricted cash equivalents | 0 | 0
Total assets measured and recorded at fair value | 0 | 0
Liabilities: |  |
Warrant liability | 0 | 0
Contingent consideration | 0 | 0
Total liabilities measured and recorded at fair value | 0 | 0
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3) |  |
Assets: |  |
Cash equivalents | 0 | 0
Restricted cash equivalents | 0 | 0
Total assets measured and recorded at fair value | 0 | 0
Liabilities: |  |
Warrant liability | 114 | 55
Contingent consideration | 4,896 | 4,633
Total liabilities measured and recorded at fair value | $ 5,010 | $ 4,688

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